package com.atguigu.springcloud.service;

import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.PathVariable;

import java.util.concurrent.TimeUnit;

/**
 * @ClassName PaymentService
 * @Description 此类描述:
 * @Author dangchen
 * @DateTime 2022-09-24 20:39
 * @Version 1.0
 */
@Service
public class PaymentService {
    /**
     * 正常访问,一切OK
     * @param id
     * @return
     */
    public String paymentInfo_OK(Integer id){
        return "线程池:" + Thread.currentThread().getName() + "paymentInfo_OK,id:"+ id + "\t" + "O(∩_∩)O";
    }

    /**
     * 超时访问,演示降级
     * @param id
     * @return
     */
    @HystrixCommand(fallbackMethod ="paymentInfo_TimeOutHandler",commandProperties = {@HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds",value = "3000")})
    public String paymentInfo_TimeOut(Integer id){
        //造两个异常,当前服务不可用了，做服务降级，兜底的方案都是paymentInfo_TimeOutHandler
        //int age = 10/0;//计算异常
        int second = 5;//我们能接受3秒钟，它运行5秒钟，超时异常
        try {
            TimeUnit.SECONDS.sleep(second);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return "线程池:" + Thread.currentThread().getName() + "paymentInfo_TimeOut,id:"+ id + "\t" + "O(∩_∩)O,耗费秒:" +second;
    }
    public String paymentInfo_TimeOutHandler(Integer id){
        return "/(ㄒoㄒ)/调用支付接口超时或异常：\t"+ "\t当前线程池名字" + Thread.currentThread().getName();
    }

    //=========服务熔断
    @HystrixCommand(fallbackMethod = "paymentCircuitBreaker_fallback",commandProperties = {
            @HystrixProperty(name = "circuitBreaker.enabled",value = "true"),
            @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold",value = "20"),
            @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds",value = "5000"),
            @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage",value = "50"),
    })
    public String paymentCircuitBreaker(@PathVariable("id") Integer id){
        if (id < 0){
            throw new RuntimeException("---id 不能为负数");
        }
        String serialNumber = IdUtil.simpleUUID();

        return Thread.currentThread().getName() + "\t调用成功,流水号: " + serialNumber;
    }

    public String paymentCircuitBreaker_fallback(@PathVariable("id") Integer id){
        return "id 不能为负数,请稍后再试 (ㄒoㄒ)~~ id："+ id;
    }
}
